JPS58139360A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To confirm optionally the presence/absence of a tape cassette, by turning on a power supply switch, and projecting a tape driving section from a console with a motor, when a tape driving section is contained in the console without the tape cassette being loaded. CONSTITUTION:When the power switch 4 turns off with the tape driving section slided at the outside of the console, a position detection switch 3 is already turned on and an input terminal 15b of an NAND gate 15 is an L level. The other input terminal 15a of the NAND gate 15 changes from H to L, and the output of the gate 15 goes from H to L. Since a flip-flop 17 to a set terminal S of which this output is inputted is operated at the trailing of the input, the Q output goes to H being the output state at set operation and it is inputted to a terminal C of a driving circit 9 to drive a motor 10 and to contain the tape driving section in the console.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a tape drive unit for mounting a tape cassette and running the tape at a constant speed, fast forwarding and rewinding, etc., to the main body of a magnetic recording and reproducing apparatus. The present invention relates to a slideable magnetic recording/reproducing device, and aims to improve operability particularly when turning on and off the power.

In conventional magnetic recording and reproducing devices, the tape drive section is slidable, and when a tape cassette is to be loaded, the tape drive section is slid to protrude outside the device housing and the tape cassette is moved. At the time, there was a magnetic recording/reproducing device equipped with a mechanism that could be slid inside the housing to start driving. In this type of magnetic recording/reproducing device, when the tape drive section is slid inside the housing and stored, it is not visible from the outside whether a tape cassette is installed. You have to slide the cassette out of the casing to check it, and if you don't check this, it often happens that the tape cassette is not actually installed and there is no playback sound when you press the play button. Ta. In addition, if a safety device is installed to prevent any movement when a tape cassette is not installed, even if you press the travel control button without checking the presence or absence of a tape cassette, it will not operate at all, which may be mistaken for a malfunction. However, there is the inconvenience of having to slide the tape drive unit to the outside of the housing each time to check the presence or absence of a tape cassette.

The present invention solves the above-mentioned conventional drawbacks, and the tape drive section is housed inside the case without a tape cassette being installed.When the special power switch is turned on, the tape drive section slides out of the case. Further, to provide a magnetic recording and reproducing device having a configuration in which when a power switch is turned off while the tape drive unit is outside the casing, the power is substantially cut off after the tape drive unit is slid and stored in the casing. It is something.

An embodiment of the present invention will be described below based on the drawings. 1
is a tape cassette detection switch, which is turned on when a tape cassette is installed and turned off when there is no tape cassette. 2゜3 is a position detection switch for the tape drive unit, switch 2 is turned on when the tape drive unit is completely stored inside the housing, and switch 3 is turned on when the tape drive unit has finished sliding outside the housing. It is.

4 is a power switch and other control circuits not shown.

When turning on the power to the audio signal circuit, etc., it is connected to the +B side, and when turning off, it is connected to the ground side. Reference numeral 6 denotes an OR gate that outputs the output of the power switch 4, and its output is applied to the base of the control transistor 6a of the sub-power switch 60. The emitter of the sub power switch 6 is 10B.
A drive transistor 6b is connected to the power supply and whose base is connected to the collector side of the control transistor 6&, and the collector of the drive transistor 6b is connected to the other control transistor N.
Road.

It is connected to a power supply terminal 7 for an audio signal circuit or the like.

8 is a signal generation circuit that generates a detection signal when the power is turned on;
The power switch 4 is connected to the +B side, and the sub power switch 6
When the output is generated, a LOW (hereinafter abbreviated) level signal is generated as an output. 9 is a drive circuit for the motor 10, which is connected to the 0 terminal by the control unit 11 surrounded by a broken line in the figure.
When an IGH (hereinafter abbreviated as H) level signal is applied, the motor 10 is driven to slide the tape drive n5 (not shown) to the outside of the casing of the apparatus main body, and an H level signal is applied to the -1000C terminal. At other times, the motor 1o is driven to slide the tape drive section into the housing. Note that the power to the control unit 11 is constantly applied directly from the 10B power source.

Next, the operation of this embodiment will be explained. First, no tape cassette is installed, the tape drive unit is stored inside the main body of the device, and the power switch 4 is turned off (general rest state).
I will tell you from a certain point in time. At this time, since no tape cassette is attached, the tape cassette detection switch 1 is off, and the input terminal 121L of the AND gate 12 connected to this switch 1 is at H level. Further, since the tape drive section is housed within the housing, the position detection switch 2 is on and the switch 3 is off. Therefore, the input terminal 13b of the NAND gate 13 is at the L level, and the input terminal of the inverter 140 and the input terminal 15b of the NkND gate 16 are at the H level. Note that 16 is a NAND gate and is generated by inverting only the output, so it is written as NAND.

From this state, turn on the power switch 4 and connect it to 10B.
When connected, one input terminal of the OR gate 5 becomes H level, the control transistor 6a is turned on, the drive transistor 6b is turned on (the sub power switch is turned on), and the power supply terminal 7 receives 10B. At this time, a power-on detection signal (L level) is generated from the signal generating circuit 8, and the other input terminal 131L of the NARD gate 13 becomes L level, and both input terminals are at L level.
An H level output from the HAND gate 13 is input to the set end terminal of the SR flip-flop 160. Since this flip-flop 16 performs setting and resetting operations at the rising edge of the signal input to the set terminal S and reset terminal H, it is set when the power is turned on.

This resetting of the flip-flop 16 generates a signal at the erosion level from the C terminal, which is input to the other input terminal 12b of the AND gate 12. 1 tape cassette is installed: ・There is no tape cassette installed, switch 1 is off, and the blade terminal 121L of the ND gate 12 is at H level, so an H level output is driven from this ND gate 12. It is applied to the 0 terminal of circuit 9. Therefore, the motor 1o slides the tape drive section out of the housing.

This tape drive unit is slid to the outside of the housing, and when the sliding is completed, the switch 3 is turned on, and the input terminal 15 of the inverter 40 and the NARD gate 16 is turned on.
b becomes L level. This inverter 4 gives an H level output to the reset terminal H of the flip-flop 16,
Since the flip-flop 16- is reset, the output of the C terminal becomes L level. Therefore, the output of the ND gate 12 becomes L level, the C terminal of the drive circuit 9 becomes L level, and the driving of the motor o is stopped. In addition, NmuN
The other input terminal 151L of the D gate 15 is connected to the output of the power switch 4 and is at H level, so the output remains at H level, the flip-flop 17 is not set, and no output is generated at the C terminal. (Remains at L level). Here, the flip-flop 17 is operated in a set operation or one set operation at the fall of the input, and the output C terminal becomes an H level in a cent operation and an L level in a reset operation. Note that the set terminal and reset terminal of this flip-flop 17 will be expressed as S and R, respectively.

As described above, when the tape drive unit is housed in the housing without a tape cassette installed, the power switch 4
When turned on, the tape drive unit is slid and projected from the housing by the motor 1o, so that the presence or absence of a tape cassette can be immediately checked, and the tape cassette can be loaded immediately. After the tape cassette is installed, the tape drive unit can be housed and the tape can be driven by a subsequent operation means such as a reproduction operation means (not shown).

Next, a case will be described in which the power switch 4 is turned off while the tape drive section remains slid out of the housing. At this time, the position detection switch 3 is already on,
Input terminal 15b of NAND gate 16 is at L level. When the power switch 4 is turned off, the other input terminal 15aid of the HAND gate 16 changes from the H level to the L level, and the output of the NAND gate 15 changes from the H level to the L level. Since the flip-flop 17 whose output is input to the set terminal S operates at the falling edge of the input, the Q output becomes H level, which is the output state during the set operation, and this is input to the C terminal of the drive circuit. The motor 1o is driven and the tape drive section is housed inside the casing.

When the storage of the tape drive unit is completed, the position detection switch 2
is turned on and its output side changes from H level to L level. (When the tape drive section slid to the outside of the housing, switch 2 was off and the output side was at H level.) Since this falling output is input to the reset terminal R, the flip-flop 17 is Reset and drive circuit 9
The input terminal C of the motor 10 becomes L level, and the driving of the motor 10 is stopped. At the same time, both OR gate 60 input terminals are low.
level, the output of the OR gate 6 becomes the L level, the transistors 6a+eb are cut off, and there is no output to the power supply terminal 7, and the power supply for the drive circuit 9, other control circuits (not shown), audio signal circuits, etc. Be cut off.

In other words, if the power switch 4 is turned off with the tape drive unit still sliding out of the housing, the tape drive unit is housed inside the housing by the power of the motor 10, and after the tape drive unit is housed, the power supply for most of the magnetic recording and reproducing apparatus is turned off. is shut off and becomes dormant.

Note that power is always applied to the control unit 11 even when the power switch 4 is turned off, but this circuit configuration 2C-M
If it is constructed from an OS integrated circuit, its power consumption is minimal. Further, in order to turn off the power of all the circuits including the control section 11, an instantaneous turn-on, time-limited relay, bidirectional thyristor, or the like may be used.

According to the configuration of the above embodiment, when the tape drive section is housed in the housing, if the power switch 4 is turned on, the power of the motor 1o is turned on when no tape cassette is attached to the tape drive section. The tape drive is first:
It is slid outside the body. Therefore, it can be immediately determined that a tape cassette is not installed, and furthermore, the tape cassette can be installed immediately without any special eject operation, so there is no mistake that the tape cassette is defective, and the operation is extremely easy. It is. Also, at the end of a performance, the tape drive unit is often slid outside the housing to remove the tape cassette.
If the power switch 4 is turned off in this state, the motor 10 automatically stores the tape drive section inside the casing, and then the power to the circuit section including the motor 10 is cut off. In other words, it is possible to prevent the tape drive section from being left outside the housing and allowing foreign matter or dust to enter therein, which could lead to malfunctions.

Furthermore, when this magnetic recording/reproducing device is placed on a rack or the like, even if the rack door is closed inadvertently, it is possible to prevent the door from hitting the tape drive section and damaging both of them.

As is clear from the above embodiments, the present invention provides a tape drive section that is movable between two positions, inside and outside the main body of a magnetic recording apparatus, and a means for detecting the position of the tape and the drive section. , comprising means for detecting whether or not a tape cassette is attached to the tape drive section; and a control section for inputting the outputs of the respective detection means and controlling the drive means for moving the tape drive section; When the tape drive section is located inside the apparatus main body without being installed, the control section controls the drive means to move the tape drive section to a position outside the apparatus main body upon detection of power-on. Since the tape drive unit moves outside when the power is turned on, it is possible to immediately determine whether a tape cassette is present, and the tape cassette can be loaded immediately to make it easier to move on to the next operation, greatly improving operability. It is. Additionally, if the power is turned off while the tape drive is outside the main unit, the tape drive can be stored inside the main unit under the control of the control unit, allowing foreign matter or dust to enter the tape drive itself or through its opening, causing malfunctions. Therefore, it is possible to provide an excellent magnetic recording and reproducing device that is highly durable and safe.

[Brief explanation of the drawing]

The figure is a circuit configuration diagram showing a main part of an embodiment of the present invention. 1... Tape cassette detection device, 2, 3...
... Position detection switch, 4 ... Power switch, 6 ... Sub-power switch, 8 ... Signal generation circuit, 9 ... Drive circuit, 10・・・・・・
Motor, 11...Control unit.

Claims (2)

[Claims] (1) The magnetic recording/reproducing device is provided so as to be movable between a first position inside the main body and a second position outside the main body, and a tape cassette can be inserted into and removed from the second position. , a tape drive section capable of driving a tape cassette in the first position; a tape cassette detection means for detecting whether or not a tape cassette is attached to the tape drive section; tape drive unit position detection means that generates a detection output when the tape drive unit is in the first position and when the tape drive unit is in the second position; and a drive unit that moves the tape drive unit between the first position and the second position. , the tape cassette detection means, the tape drive unit position detection means, and a control section that takes as input the output of the means for detecting power on/off and generates a control output to the drive means; When inputting the detection output of the tape cassette detection means indicating that there is no tape cassette and the detection output of the tape drive position detection means indicating that the tape drive is in the first position inside the main body, the detection output of the power on is input. A magnetic recording/reproducing apparatus characterized in that the tape drive section is moved to a second position by the drive means upon receiving an input. (2) When inputting the detection output of the tape drive position detecting means indicating that the tape drive section is in the second position outside the main body, the control section inputs the detection output of power off and causes the drive means to The magnetic recording and reproducing apparatus according to claim 1, characterized in that the tape drive unit is configured to move to the first position.